Sequential Delivery Valve Apparatus and Methods

摘要

A sequential delivery valve provides sequential delivery of gas propellant and liquid product from a container to a dispensing head for ejecting an atomized spray from the dispensing head. When the dispensing head is depressed, a pusher in the valve passes from a closed position wherein no liquid and no gas is allowed to travel through the valve to a partially open position where only gas is allowed to travel through the valve and eventually to a fully open position wherein both gas and liquid are allowed to travel through the valve into the dispensing head. When the dispensing head is released, the pusher passes from the fully open position back to a partially open position allowing only gas to travel through the valve and eventually to the closed position wherein no gas and no liquid are allowed to travel through the valve into the dispensing head.